Roof-joint.



No. 696,139. Ptented Mar. 25, I902.

I c. A. GBANTON.

ROOF JOINT.

Application fllgd Nov. 11, 19m. '(No Model.)

W536. I V I I IwQQJCKiQPZ I ML SWW 19 01 mm,

- E-QQMAAMJ UNITED STATES PATENT rarest CLIFTON A. GRANTON, OFIIAVERHILL, MASSACHUSETTS.

ROOF-JOINT.

SPECIFICA'IION forming part of Letters Patent N0.;.6 96,1 39, datedMarch 25, 1902. Application filed November 11,1901- Serial No. 81,856.(No model.)

T at whom it may concern Be it known that I, CLIFTON A. GRANTON, acitizen of the United States,residing at Haverhill, in the county ofEssex and State of Massachusetts, have invented certain new and usefulImprovements in Roof-Joints,of which the following is a specification.

' A common formofroof-joint for soil-pipes and the like consists of aperforated sheetc'opper flashing having its perforation surrounded by anupwardly-extending flange and a cylindrical thimble the lower endofwhich is beveled to correspond with the pitch of a roof and is slippedover the flange on the flashing.

, over the hole, through which the soil pipe passes and is covered byshingles or slate, and

a suitable packing is introduced between the upper end of the thirnbleand the sides of the pipe to form a tight joint. Since difierent roofsdiffer greatly in their pitch, it has hitherto been necessary to carryin stock a number of thimbles having their respective lower edgesbeveled at angles corresponding sub stantially with the pitch ofdifferent roofs, and it has also been necessary to provide flash} ingswith perforations and flanges correspond-'1 ing'in shape to the lowerends of these differ- ;entthimbles'because the flatter the roof the Yshorter-will be the ellipse formed by the lower end of the beveledcylindrical thimble, and

hence the shorter must be the ellipse formed .hy the flange over whichthe thimble fits. The result has been that it has not only beennecessary to carry a large number of thimbles and flashings in stock,but .it also fre quently happens that a plumber will take .with him aflashing and thimble which prove to be of the wrong size to fit the roofon which he is at work, and a considerable amount of trouble and delayis thus involved in changing them. a v

My invention is intended to provide a simed to fit a roof of any pitch;and to thisend I employ a flashing made substantially like thoseheretofore used, but with a perforation I so which is large enough to beusedwith a roof The flashing is secured to the roof,

pie and inexpensive roof-joint of the type i of the steepest pitch, towhich my joint must be fitted, and I provide a thimble the lower end of:which is adapted to be trimmed or chipped off, and thus made to form anyde sired angle with its axis, and I form. this thinible with anoutwardly bulging or flaring portion so proportioned that after trimmingor chipping the thimble to provide the desired angle its lodver end willstill receive the upwardly-projecting flange on the dashing and restupon the flat base of the latter in the usual manner.

In the accompanying drawings, Figure l is a central vertical sectionthrough a portion of a roof with a joint embodying my invention appliedthereto, and Fig. 2 is a similar section showing my joint applied to aroof of different pitch from that shown in Fig. 1.

' As shown in the drawings, my joint comprises a perforated flashing 2,having its perforation surrounded by an upwardly-extending flange 3,around which a thimble 4 is fitted. This thimble is provided, preferablyon its lower side, witlian outwardly-bulging portion 5 of such a shapethat if the bottom of the thimble is cut oh on any plane intersectingthe upper side of its lower edge and making any desired angle with itsaxis within the usual limits the bottom of the thimble will still fitover the flange 3 of the same flashing. The thimble 4; is preferablymade of cast iron, and in this case it is scored internally, as shown at6, along lines on which it is intended to have its lower edge removed inordcrthat those portions of the thimble which are below either of thelines 6 may be easily chipped ofifi by the plumber when attaching thedevice to a roof.

It is the custom to use a flashing and thin1-' ble which fit looselyover the soil-pipe,and hence the thimble shown in Fig. 1 may be ap pliedwithout changing its lower edge to roofs which do not vary in pitch fromthat shown in Fig. 1 more than one inch to the foot either way withoutmaterially disturbing the relative position of the parts or causing thethimble to make an unsightly angle with the roof and soil-pipe, and thesame is true when the. thimble is trimmed, as above described so that inpractice I prefer to score the thimble along the two lines 6 only, whichare so located. that before the thiinble has been trimmed at all itmaybe used with roofs having a-pitch of from ten to twelve inches to thefoot, and when trimmed along the lower lined it may be used with rootshaving-a pitch of from eight to nine inches to the foot, and whentrimmed alongthc upperline 6 it may be used with roofs having a pitch offrom six to seven inches to the foot. It will be under.- stood, however,that the bulging portion 5 maybe so formed as. to make the thimbleeapableof being fitted to roots of greater or less pitch than thoseabove mentioned; but in order to avoid making the thimbles undesirablyheavy and unsightly I prefer tomake them in two sizes, one adapted to beused for the roofs above referred to and the other for roofs varyingfrom a flat roof to one having a pitch of six inches to the foot, as itwill always be very easy for the plumber to determine at a glance whichsize is to be used with a given roof, and thus to avoid any possibilityof mistake. it will be understood also that instead of making thethimble of castiron it may be made of copper, lead, or other suitablematerial, in'which case the scored lines 6 may be omitted and thethimble may be trimmed to any desired angle with an ordinary pair ofmetal-cutting shears.

I prefer to make one side'of theflange 3 high-enough to cover the spaceleft by the bulging portion 5, as shown at 7, in order to prevent snowand ice from working up under the lower edge of the thimble through saidbulging portion and over the top 0 the flange.

The flange 3 will. evidently be somewhat inclined to the vertical, asindicated in Fig.

2, except when applied ton roof of one particular pitch; but there isenough space between the thimb le and the soil-pipe to prevent suchinclination from interfering materially with tl oifitting of the partstogether, and even if said parts do bind somewhat the flange is so thinand flexible thatit willyield readily. i

In applyingmy roof-joint the flashing is passed over the pipe 8 andsecured to the roof 9 in the usual manner, and the thimble is thenslipped over said pipe and fitted around the flange 3 after which apacking of any approved kind 15 applied at the top of the thimble forclosing the space between it and the pf'e ,8, art ordinarycalked joint10 being shown inthe drawings. It will be noted that my thunble is notrigidly attached to the flashing at any point, but forms a slip-jointtherewith, so \hat expansion and contraction or the pipe 8 will have notendency to distnrb theattazhmen't of the flashing to the roof v i Iclaim as my invention,

' .1. In a roof-joint, a thimble having its bottom ,edge inclined withrespect to its axis to correspond with the pitch of the steepest roof towhich the joint is to be applied, and adapted to have portions of saidbottom edge re-. moved along various planes converging toward the upperside of the thimble, thelower side wall of said thimble being'bulgedoutwardly in such manner as to havca substantially constant ellipticalsection on any of said planes, substantially as and for the purpose setforth.

2. -In a roof-joint, a cast-iron thimblehaving its bottom edge inclihedwith respect to its axis and scored onlines corresponding with planes ofvarying inclination which converge toward the upper side of thetlnmblonear its top, said thimble having its lower side wall bulgedoutwardly in such manner as to have a substantially constant ellipticalsection on any of said planes, substantially steepest roof to which thejoint is to be apf plied, and adapted to have portions of said bottomedge removed along various planes converging toward the upper side 0!the th1m-.

.ble, the lower side wall of said thimble being bulged outwardly in suchmanner as'to be capable of receiving said flange when trimmed along anyof said planes, substantially as described.

4. .A roof-joint comprising, in combination, a perforated flashingprovided with an upwardly extending flange, and a thimble adapted to fitloosely over said flange and rest upon the base of said flashing-withits upper and substantially horizontal, said thimble having its bottomedge adapted to be removed along various planes converging toward theupper side of said thimble and having its lower side wall bulgedoutwardly in such manner as to give it a substantially constant sectionon any of said planes, substantially as described.

5. A roof-joint comprising, in combination, a flashing having a base 2provided with-an elliptical perforation surrounded bya flange extendingupwardly therefrom, and a castiron thimble 4adapted to fit loosely oversaid flange and rest upon the base 2 with its'upper end substantiallyhorizontal, said thimble having its lower side wall bulgdd outwardly at5, as described, and beingscbrod along lines 6 converging toward theupper side of said thimble, near its top, substom tially as described.

6. A roof-joint comprising, in combination, a flashing having a base 2provided with an elliptical perforation surrounded by a flange 3extending upwardly therefrom, and a castiron thimble 4 adapted to fitloosely over said flange and rest upon.the base 2 with its upper endsubstantially horizontal, said thimble having its lower side wall bulgedout v vajdly at 5, as described, and beihg scoredsribed my name this 5thday of November, along lines 6 converging toward the upper 1901.

side .of 's'aid thimble near its tbp the fiange3 v being increased inheight at; its iower side to CLIB EON GRAN 1 5 cover the spae left bysaidzbulging portion Witnesses:

in the-intrid1;,of the thimble. GREENLEF CLARKE,

' In testimony whereof Iha ye hereunto sub HARRY L. ROGERS;

